全文获取类型
收费全文 | 6096篇 |
免费 | 393篇 |
国内免费 | 20篇 |
专业分类
耳鼻咽喉 | 107篇 |
儿科学 | 168篇 |
妇产科学 | 118篇 |
基础医学 | 857篇 |
口腔科学 | 426篇 |
临床医学 | 445篇 |
内科学 | 1268篇 |
皮肤病学 | 143篇 |
神经病学 | 437篇 |
特种医学 | 132篇 |
外科学 | 863篇 |
综合类 | 21篇 |
一般理论 | 2篇 |
预防医学 | 616篇 |
眼科学 | 205篇 |
药学 | 382篇 |
中国医学 | 48篇 |
肿瘤学 | 271篇 |
出版年
2023年 | 41篇 |
2022年 | 103篇 |
2021年 | 185篇 |
2020年 | 125篇 |
2019年 | 163篇 |
2018年 | 210篇 |
2017年 | 152篇 |
2016年 | 167篇 |
2015年 | 195篇 |
2014年 | 266篇 |
2013年 | 307篇 |
2012年 | 474篇 |
2011年 | 446篇 |
2010年 | 265篇 |
2009年 | 186篇 |
2008年 | 320篇 |
2007年 | 308篇 |
2006年 | 299篇 |
2005年 | 281篇 |
2004年 | 271篇 |
2003年 | 268篇 |
2002年 | 176篇 |
2001年 | 133篇 |
2000年 | 139篇 |
1999年 | 125篇 |
1998年 | 33篇 |
1997年 | 24篇 |
1996年 | 30篇 |
1995年 | 33篇 |
1994年 | 27篇 |
1993年 | 23篇 |
1992年 | 77篇 |
1991年 | 67篇 |
1990年 | 69篇 |
1989年 | 47篇 |
1988年 | 56篇 |
1987年 | 54篇 |
1986年 | 49篇 |
1985年 | 49篇 |
1984年 | 28篇 |
1983年 | 19篇 |
1982年 | 12篇 |
1981年 | 12篇 |
1979年 | 22篇 |
1975年 | 15篇 |
1974年 | 14篇 |
1973年 | 16篇 |
1972年 | 15篇 |
1969年 | 13篇 |
1968年 | 11篇 |
排序方式: 共有6509条查询结果,搜索用时 15 毫秒
31.
32.
Ana Luísa Soares de Miranda Bruno Cesar Antunes Joo Carlos Minozzo Sabrina de Almeida Lima Ana Flvia Machado Botelho Marco Túlio Gomes Campos Carlos Delfin Chvez-Olrtegui Benito Soto-Blanco 《Toxins》2022,14(5)
Bites of brown spiders (Loxosceles spp.) are responsible for dermonecrotic lesions and potentially systemic envenoming that can lead to death. The only effective therapy is the use of the antivenom, usually produced in horses. However, little is known about the consequences of the systematic use of the Loxosceles venom and adjuvants and of the bleedings on antivenom-producing horses. Thus, the aim of this study was to evaluate the clinical changes in horses in their first immunization protocol for Loxosceles antivenom production. Eleven healthy horses, never immunized, were evaluated in three different periods: T0 (before immunization); T1 (after their first venom immunization); and T2 (after their first bleeding). Horses were clinically evaluated, sampled for blood, and underwent electrocardiographic (ECG) recordings. Several suppurated subcutaneous abscesses occurred due to the use of Freund’s adjuvants and thrombophlebitis due to systematic venipunctures for the bleeding procedures. ECG showed arrhythmias in few horses in T2, such as an increase in T and R waves. In summary, the immunization protocol impacted on horses’ health, especially after bleeding for antivenom procurement. 相似文献
33.
Michela Fresina Anna Dickmann Annabella Salerni Fabio De Gregorio Emilio C. Campos 《Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie》2008,246(1):143-150
Purpose The purpose of the study was to evaluate the effect on visual function of orally administered CDP-choline in addition to patching
for the treatment of amblyopia in children.
Methods This was an open label parallel group study comparing patching plus oral CDP-choline with patching alone. Sixty-one participants
(aged between 5 and 10 years) suffering from anisometropic or strabismic amblyopia were divided at random into two groups:
Group A, 800 or 1,200 mg (according to the body weight) of orally administered CDP-choline and 2-h patching a day; Group B,
2-h patching a day. Both groups were treated for 30 consecutive days. A follow-up visit was set 60 days after the treatment
was discontinued. The main outcome measure was the change in visual acuity of amblyopic eyes as measured by Snellen’s E charts.
The secondary outcome measures were changes in the visual acuity of amblyopic eye as measured by isolated letters (Snellen’s
E) and changes in the contrast sensitivity of amblyopic eyes.
Results The addition of CDP-choline to patching therapy was not found to be more effective than patching alone after 30-day treatment.
The present results showed that adding CDP-choline to patching stabilised the effects obtained during the treatment period.
In fact, whereas the participants treated only with patching showed a decrease in visual acuity at 90 days, these receiving
CDP-choline and patching combined appeared to maintain the results obtained (two-way ANOVA: P = 0.0042). Similar results were obtained when measuring visual acuity by isolated Snellen’s E letters.
Conclusions In amblyopic patients, CDP-choline combined with patching contributes to obtaining more stable effects than patching alone.
Fabio De Gregorio works as an advisor for Tubilux Pharma S.p.A.
The authors have full control of all primary data and they agree to allow Graefe’s Archives for Clinical and Experimental Ophthalmology to review their data if requested. 相似文献
34.
35.
Frutuoso C Henriques I Pazos I Abraul E Pego A Belo J Campos O Gervásio H de Oliveira C 《European journal of gynaecological oncology》2007,28(6):447-450
Primary chemotherapy is increasingly used in patients with large operable breast cancer. Docetaxel and epirubicin are the most active agents in breast cancer treatment. PURPOSE: To evaluate clinical response rate, breast conserving surgery and pathological response rate in patients with large operable breast cancer treated with docetaxel followed by docetaxel and epirubicin as primary chemotherapy. PATIENTS AND METHODS: Patients with operable breast cancer more than 3 cm in the longest diameter with T2N0, T2N1 and T3N0 disease were enrolled. Patients were treated with three cycles of docetaxel 100 mg/m2 followed by three cycles of docetaxel 75 mg/m2 and epirubicin 90 mg/m2 prior to surgery. RESULTS: Sixty-five patients were enrolled between 09/2002 and 12/2005. The median age was 48.9 years and 72.3% were premenopausal. Median tumour size was 4.26 cm, 10.8% were T3 tumours and 38.5% had clinical positive lymph nodes. Of the tumours 58.5% were grade 1/2, 33.9% ER positive and 21.5% c-erb negative. All six cycles were administered to 62 patients; six cycles were delayed and five had dose reductions. Complete clinical response occurred in 41.5% of patients and partial response in 49.2%. Breast conserving surgery was performed in 30% of patients however it was feasible in 57%. Complete pathological response occurred in both primary tumour and nodes in 28%, and in 34% just in the primary tumour. Nine percent of cases had neutropenia and 7.7% febrile neutropenia, and two cases had a hypersensitivity reaction to docetaxel. One associated treatment death occurred. CONCLUSION: Docetaxel followed by epirubicin and docetaxel as primary chemotherapy results in a high clinical and pathological response rate. The majority of adverse events were predictable and manageable. 相似文献
36.
Gloria PrezGimeno Azahara I. Ruperez Mercedes GilCampos Concepcin M. Aguilera Augusto Anguita Rocío VzquezCobela Estela Skapino Luis A. Moreno Rosaura Leis Gloria BuenoLozano 《Journal of clinical hypertension (Greenwich, Conn.)》2022,24(6):713
Due to the absence of easily applicable cut‐off points to determine high blood pressure or hypertension in children, as in the adult population, blood pressure is rarely measured in the pediatrician''s clinical routine. This has led to an underdiagnosis of high blood pressure or hypertension in children. For this reason, the present study evaluate the utility of five equations for the screening of high blood pressure in children: blood pressure to height ratio, modified blood pressure to height ratio, new modified blood pressure to height ratio, new simple formula and height‐based equations. The authors evaluated 1599 children between 5 and 18 years. The performance of the five equations was analyzed using the receiver‐operating characteristics curves for identifying blood pressure above P90th according to the American Academy of Pediatrics Clinical Practice Guideline 2017. All equations showed an area under the curve above 0.882. The new modified blood pressure to height ratio revealed a high sensitivity whereas the height‐based equations showed the best performance, with a positive predictive value above 88.2%. Finally, all equations showed higher positive predictive values in children with overweight or obesity. The height‐based equation obtained the highest PPV values above 71.1% in children with normal weight and above 90.2% in children with overweight or obesity. In conclusions, the authors recommend the use of the height‐based equations equation because it showed the best positive predictive values to identify children with elevated blood pressure, independently of their sex, pubertal and weight status. 相似文献
37.
Characterization of Leishmania species from Peru 总被引:1,自引:0,他引:1
G G Romero M Arana M López I Montoya R Bohl M Campos J Arévalo A Llanos 《Transactions of the Royal Society of Tropical Medicine and Hygiene》1987,81(1):14-24
Twenty-six isolates of Leishmania parasites of Peruvian origin were studied by isoenzyme electrophoresis of four marker enzymes (ASAT, ALAT, G6PD and GPI), kinetoplast DNA hybridization and monoclonal antibody binding and compared with marker strains of the New World organisms L. b. braziliensis, L. b. guyanensis, L. m. mexicana and L. m. amazonensis. 12 of the isolates studied were of Andean origin; 11 of these were isolated from patients with Andean cutaneous leishmaniasis. The organisms originating from the Peruvian Amazonian forest were isolated from patients with cutaneous (12 cases) or mucocutaneous (2 cases) leishmaniasis. One of the Andean isolates was obtained from an infected phlebotomine vector. 25 of the new isolates were identified as L. braziliensis ssp. according to the three techniques employed. The results of monoclonal antibody binding showed that 23 of the isolates were indistinguishable from L. b. braziliensis. Two isolates identified as L. braziliensis ssp. according to their isoenzyme profiles and k-DNA hybridization patterns could not be classified at the subspecies level. The isolate obtained from the phlebotomine vector could not be identified. No evidence of the existence of parasites of the L. mexicana complex in Peruvian territory was found in this study. The results obtained show a remarkable similarity between Leishmania of Andean origin and L. b. braziliensis. 相似文献
38.
EG Guerrero M Campos D Urada JC Yang 《Substance abuse treatment, prevention, and policy》2012,7(1):34
ABSTRACT: BACKGROUND: Increasing evidence suggests that culturally and linguistically responsive programs may improve substance abuse treatment outcomes among Latinos. However, little is known about whether individual practices or culturally and linguistically responsive contexts support efforts by first-time Latino clients to successfully complete mandated treatment. METHODS: We analyzed client and program data from publicly funded treatment programs contracted through the criminal justice system in California. A sample of 5,150 first-time Latino clients nested within 48 treatment programs was analyzed using multilevel logistic regressions. RESULTS: Outpatient treatment, homelessness, and a high frequency of drug use at intake were associated with decreased odds of treatment completion among Latinos. Programs that routinely offered a culturally and linguistically responsive practice---namely, Spanish-language translation---were associated with increased odds of completion of mandated treatment. CONCLUSIONS: These preliminary findings suggest that concrete practices such as offering Spanish translation improve treatment adherence within a population that is at high risk of treatment dropout. 相似文献
39.
40.
Coexistence of benign phyllodes tumor and invasive ductal carcinoma in distinct breasts: case report
Guerino Barbalaco Neto Claudia Rossetti Natalia A Souza Fernando LA Fonseca Ligia Ajaime Azzalis Virginia Berlanga Campos Junqueira Vitor E Valenti Luiz Carlos de Abreu 《European journal of medical research》2012,17(1):8
This report describes a rare case of coexistence of benign phyllodes tumor, which measured 9 cm in the right breast, and invasive ductal carcinoma of 6 cm in the left breast, synchronous and independent, in a 66-year-old patient. The patient underwent a bilateral mastectomy due to the size of both lesions. Such situations are rare and usually refer to the occurrence of ductal or lobular carcinoma in situ when associated with malignant phyllodes tumors, and more often in ipsilateral breast or intra-lesional. 相似文献