全文获取类型
收费全文 | 22407篇 |
免费 | 1182篇 |
国内免费 | 95篇 |
专业分类
耳鼻咽喉 | 309篇 |
儿科学 | 668篇 |
妇产科学 | 487篇 |
基础医学 | 3083篇 |
口腔科学 | 1347篇 |
临床医学 | 2248篇 |
内科学 | 4712篇 |
皮肤病学 | 446篇 |
神经病学 | 1929篇 |
特种医学 | 384篇 |
外科学 | 2153篇 |
综合类 | 141篇 |
一般理论 | 11篇 |
预防医学 | 2542篇 |
眼科学 | 474篇 |
药学 | 1370篇 |
中国医学 | 95篇 |
肿瘤学 | 1285篇 |
出版年
2024年 | 27篇 |
2023年 | 232篇 |
2022年 | 476篇 |
2021年 | 889篇 |
2020年 | 506篇 |
2019年 | 738篇 |
2018年 | 824篇 |
2017年 | 602篇 |
2016年 | 611篇 |
2015年 | 738篇 |
2014年 | 995篇 |
2013年 | 1204篇 |
2012年 | 1936篇 |
2011年 | 2060篇 |
2010年 | 1007篇 |
2009年 | 876篇 |
2008年 | 1509篇 |
2007年 | 1483篇 |
2006年 | 1361篇 |
2005年 | 1206篇 |
2004年 | 1042篇 |
2003年 | 976篇 |
2002年 | 913篇 |
2001年 | 119篇 |
2000年 | 97篇 |
1999年 | 87篇 |
1998年 | 159篇 |
1997年 | 106篇 |
1996年 | 86篇 |
1995年 | 77篇 |
1994年 | 77篇 |
1993年 | 64篇 |
1992年 | 42篇 |
1991年 | 46篇 |
1990年 | 42篇 |
1989年 | 29篇 |
1988年 | 22篇 |
1987年 | 32篇 |
1986年 | 30篇 |
1985年 | 25篇 |
1984年 | 33篇 |
1983年 | 32篇 |
1982年 | 39篇 |
1981年 | 33篇 |
1980年 | 29篇 |
1979年 | 19篇 |
1978年 | 10篇 |
1977年 | 19篇 |
1976年 | 14篇 |
1975年 | 13篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
Augusto Ferrari MD Luigi Frigerio MD 《American journal of obstetrics and gynecology》1997,177(6):1426-1431
OBJECTIVE: We describe an alternative sling procedure that permits concomitant correction of urethral hypermobility and urinary incontinence through a single surgical exposure. STUDY DESIGN: Fifteen women with severe urinary stress incontinence and urethral hypermobility underwent a sling procedure by creation of a simple triangular patch from the anterior vaginal wall. RESULTS: The mean operative time for the vaginal sling procedure was 38 minutes (range 29 to 65 minutes) in addition to other operations. The mean postoperative hospital stay was 7.7 days (range 5 to 13 days) and all patients were routinely discharged with an indwelling Foley catheter. Spontaneous micturition occurred in 12 patients after a mean period of 25 days (range 13 to 36 days). In three cases long-term catheterization was necessary. By subjective and objective evaluations, all the patients were cured of their stress incontinence. CONCLUSION: The triangular vaginal patch with the single sutures on each side provides an alternative approach for bladder neck stabilization that may permit a more anatomic suspension of a hypermobile urethra.(Am J Obstet Gynecol 1997;177:31) 相似文献
72.
Prominent neuronal differentiation and MYCN amplification occur only in a small percentage of medulloblastomas (primitive neuroectodermal tumor of the cerebellum). In this article, we describe two medulloblastomas that showed a striking degree of neuronal differentiation with islands of mature neurons associated with abundant neuropil. In these differentiated foci, there were no mitoses or atypia, and the histology was reminiscent of a malformative or hamartomatous lesion. Both tumors were assessed for MYCN amplification by the novel technique of differential polymerase chain reaction (PCR) and fluorescent in situ hybridization (FISH). In case 1, MYCN amplification was in the 10 - fold range determined by differential PCR, while in case 2 the level of amplification was marked, with 20 - 30 copies compared with diploid controls. FISH analysis also confirmed the presence of MYCN amplification in both tumors. These two cases are of great interest, especially as they show MYCN amplification in medulloblastomas with marked degree of neuronal differentiation. Furthermore, in both cases, there was evidence of a slower and more indolent clinical course, suggesting a more favorable outcome in medulloblastoma with this degree of neuronal differentiation. 相似文献
73.
James F. Calvert Jr. MD ; Paula C. Goldenberg MD ; Cathy Schock RN 《The Journal of rural health》2005,21(1):74-78
CONTEXT: Chronic hepatitis C infection (CHCI) is an increasingly common problem, affecting about 2% of the US population. The cost and complexity of treatment and difficulties in communicating with the infected population are of concern to insurers and health planners. PURPOSE: To describe the clinical features of patients with CHCI in a rural Medicaid-covered population and to describe a method developed for treating CHCI in an underserved rural community. METHODS: We developed a disease management approach to patients with CHCI receiving insurance coverage through a Medicaid HMO in rural Oregon. A locally based multidisciplinary hepatitis committee was formed to develop a management protocol and a process for selecting patients for treatment. The committee met monthly to develop the treatment plan for individual patients. Day-to-day treatment was provided by a nurse under the supervision of the committee. FINDINGS: One hundred forty-three adults with CHCI were identified by their primary care physicians. About half the patients had a type 1 genotype. Treatment with pegylated interferon and ribavirin was completed on 21 persons, 11 (52%) of whom had a virologic cure. Problems with treatment toxicity were common. Patient satisfaction with the treatment by the nurse was high. CONCLUSIONS: CHCI is common in this rural, nonminority Medicaid-insured population. A locally based disease management model was developed that was well received by patients and was successful in delivering a high quality of care for people with CHCI in a rural area. 相似文献
74.
75.
76.
Clinical application of a computerized system for physician order entry with clinical decision support to prevent adverse drug events in long-term care 总被引:1,自引:0,他引:1 下载免费PDF全文
77.
Induction of p53 up-regulated modulator of apoptosis messenger RNA by chemotherapeutic treatment of locally advanced breast cancer. 总被引:1,自引:0,他引:1
Rutger Middelburg Richard R de Haas Henk Dekker Ron M Kerkhoven Paula R Pohlmann Adolfo Fuentes-Alburo Alejandro Mohar Herbert M Pinedo Jan Lankelma 《Clinical cancer research》2005,11(5):1863-1869
PURPOSE: In biopsies of patients with locally advanced breast cancer, we investigated the in vivo changes of the gene expression pattern induced by chemotherapy to find genes that are potentially responsible for the efficacy of the drug. EXPERIMENTAL DESIGN: Early cellular responses to chemotherapy-induced damage, both in vivo and in vitro, were investigated by analyzing chemotherapy-induced changes in gene expression profiles. Core biopsies were taken from nine patients with locally advanced breast cancer, before and at 6 hours after initiation of doxorubicin-based chemotherapy. Both samples were cohybridized on the same microarray containing 18,000 cDNA spots. RESULTS: The analysis revealed marked differences in gene expression profile between treated and untreated samples. The gene which was most frequently found to be differentially expressed was p53 up-regulated modulator of apoptosis (PUMA). This gene was up-regulated in eight of nine patients with an average factor of 1.80 (range, 1.36-2.73). In vitro MCF-7 breast cancer cells exposed to clinically achievable doxorubicin concentrations for 6 hours revealed marked induction of PUMA mRNA, as well. CONCLUSIONS: This is the first report describing PUMA mRNA to be up-regulated as a response to chemotherapy in patients. Because PUMA is a known member of the family of BH3-only proapoptotic proteins, this finding suggests PUMA's potential importance for the response to anticancer drugs. 相似文献
78.
Filipa Alves da Costa Jos Pedro Guerreiro Magda Nunes de Melo Ana da Costa Miranda Ana Paula Martins Jos Garo Brenda Madureira 《The International journal of pharmacy practice》2005,13(3):205-211
Objective Poor compliance to antihypertensive medications has been identified as a primary cause of uncontrolled blood pressure (BP), with consequent increases in hypertension‐related morbidity and mortality. Therefore, any measure known to improve compliance should be encouraged. This study assessed the impact of reminder cards on compliance to antihypertensive therapy. Method A field trial was undertaken in pharmacies located in the districts of Lisbon and Porto. Eligible participants comprised those aged 30–74 years, prescribed an angiotensin‐converting enzyme inhibitor (ACEI) in monotherapy, and taken on a once‐daily regimen. Patients were allocated to control group (CG) or intervention group (IG), the latter being provided with a reminder card, an alarm‐type device due to remind the patient of the time to take his medication. Patients were monitored monthly during 3 months for compliance and blood pressure control. Key findings Seventy‐one patients participated in the study (intervention: 35; control group: 36). Compliance was similar between the groups in the first 2 months of follow‐up (97.1% IG vs 94.9% CG at first follow‐up and 97.5% IG vs 94.2% CG at second follow‐up) and higher in the intervention group at the end of the study (97.3% IG vs 87.3% CG; P = 0.011). There were no mean blood pressure differences between compliant and non‐compliant subjects at the end of the study (P value for differences in systolic BP (Psyst) = 0.580; and P value for differences in diastolic BP (Pdlast) = 0.175). Conclusion This small‐scale study indicates a possible positive impact on patients' compliance resulting from the use of reminder cards. However, this needs confirming in larger scale studies with longer monitoring periods. 相似文献
79.