全文获取类型
收费全文 | 5077篇 |
免费 | 205篇 |
国内免费 | 15篇 |
专业分类
耳鼻咽喉 | 118篇 |
儿科学 | 85篇 |
妇产科学 | 120篇 |
基础医学 | 777篇 |
口腔科学 | 62篇 |
临床医学 | 357篇 |
内科学 | 1141篇 |
皮肤病学 | 60篇 |
神经病学 | 511篇 |
特种医学 | 122篇 |
外科学 | 481篇 |
综合类 | 34篇 |
预防医学 | 402篇 |
眼科学 | 91篇 |
药学 | 520篇 |
中国医学 | 5篇 |
肿瘤学 | 411篇 |
出版年
2023年 | 14篇 |
2022年 | 84篇 |
2021年 | 156篇 |
2020年 | 69篇 |
2019年 | 86篇 |
2018年 | 117篇 |
2017年 | 78篇 |
2016年 | 74篇 |
2015年 | 94篇 |
2014年 | 142篇 |
2013年 | 197篇 |
2012年 | 281篇 |
2011年 | 327篇 |
2010年 | 176篇 |
2009年 | 174篇 |
2008年 | 243篇 |
2007年 | 281篇 |
2006年 | 311篇 |
2005年 | 274篇 |
2004年 | 265篇 |
2003年 | 223篇 |
2002年 | 227篇 |
2001年 | 144篇 |
2000年 | 129篇 |
1999年 | 111篇 |
1998年 | 55篇 |
1997年 | 33篇 |
1996年 | 36篇 |
1995年 | 28篇 |
1994年 | 23篇 |
1992年 | 41篇 |
1991年 | 52篇 |
1990年 | 63篇 |
1989年 | 62篇 |
1988年 | 61篇 |
1987年 | 75篇 |
1986年 | 49篇 |
1985年 | 68篇 |
1984年 | 34篇 |
1983年 | 32篇 |
1982年 | 22篇 |
1981年 | 14篇 |
1980年 | 17篇 |
1979年 | 33篇 |
1978年 | 13篇 |
1977年 | 16篇 |
1974年 | 29篇 |
1973年 | 21篇 |
1972年 | 22篇 |
1971年 | 25篇 |
排序方式: 共有5297条查询结果,搜索用时 312 毫秒
1.
Vilma Liaugaudaite Naomi A. Fineberg Aurelija Podlipskyte Julija Gecaite Alicja Juskiene Narseta Mickuviene 《International journal of psychiatry in clinical practice》2020,24(2):116-119
AbstractObjective: This study aims at identifying associations between cognitive function and suicidal ideation in the sample of patients with anxiety and mood disorders (AMD).Methods: In sum, 186 (age = 39?±?12.3 years; 142 [76.3%] females) patients with AMD were enrolled in the study. Assessment included evaluation of socio-demographic information, medication use, anxiety and depression symptoms. Cognitive tests included measures of psychomotor performance and incidental learning using the Digit Symbol Test. Trail Making Tests respectively measured perceptual speed, task-switching and executive control. Additionally, 21 patients completed tests from the Cambridge Automated Neuropsychological Test Battery measuring set shifting (Interdimensional/extradimensional set-shift), executive planning (Stockings of Cambridge), and decision making (Cambridge Gamble Task [CGT]).Results: Almost half (45.0%, n?=?86) of the study sample patients had experienced suicidal ideations. In multivariable regression analysis, suicidal ideation was associated with a greater overall proportion of bet and risk taking on the CGT task (β?=?0.726, p?=?.010 and β?=?0.634, p?=?.019), when controlling for socio-demographic characteristics, medication use, anxiety and depression symptoms.Conclusions: Outpatients with AMD and suicidal ideation could be distinguished by the presence of cognitive deficits in the executive function domain, particularly in impulse-control and risk taking. 相似文献
2.
3.
4.
5.
Georg Nowak 《Annals of anatomy》2006,188(3):A162
6.
Grazyna Bednarek-Tupikowska Alicja Filus Justyna Kuliczkowska-P?aksej Krzysztof Tupikowski Anna Bohdanowicz-Pawlak Andrzej Milewicz 《Gynecological endocrinology》2006,22(4):207-212
AIM: The aim of the present study was to investigate the influence of endogenous estradiol and estrogen and estrogen-progestin therapies on concentration in pre- and postmenopausal women. MATERIALS AND METHODS: The study groups consisted of 26 women with surgical menopause (mean+/-standard deviation (SD): age 51.8+/-2.6 years, body mass index (BMI) 26.45+/-4.56 kg/m(2)), 54 with natural menopause (mean+/-SD: age 50.5+/-3.0 years, BMI 25.75+/-4.09 kg/m(2)) and 40 premenopausal controls (mean+/-SD: age 48.3+/-2.3 years, BMI 26.23+/-4.12 kg/m(2)). The group with surgical menopause received estradiol transdermally (50 microg/day) and those with natural menopause received additionally medroxyprogesterone acetate (5 mg/day) for the last 12 days of the cycle. Before and after 4 months of therapy, body weight, waist and hip circumferences and blood pressure were measured, and BMI and waist-to-hip ratio (WHR) were calculated. Serum leptin, follicle-stimulating hormone (FSH), estradiol (E(2)), testosterone, prolactin and dehydroepiandrosterone sulfate (DHEAS) were measured prior to and after treatment. RESULTS: Leptin concentrations did not differ statistically among the groups. No correlations between leptin and E(2), FSH, prolactin, testosterone and DHEAS concentrations were found in any of the groups before and after treatment. Leptin level correlated positively with body mass, BMI and hip and waist circumferences in all groups. There were no correlations between leptin and WHR in the pre- and postmenopausal groups. In the premenopausal group and in some postmenopausal groups, serum leptin level correlated with blood pressure. CONCLUSIONS: Endogenous E(2) and androgens in premenopausal women and estrogen and estrogen-progestin therapies in postmenopausal subjects do not influence serum leptin concentrations. Leptin level is related to body mass and BMI, but not to sex hormone status. The distribution of adipose tissue and the type of obesity (android or gynoid) have no influence on serum leptin concentration. The correlation between serum leptin level and blood pressure requires further investigation. 相似文献
7.
Anna Krygowska-Wajs William P. Cheshire Zbigniew K. Wszolek Alicja Hubalewska-Dydejczyk Barbara Jasinska-Myga Matthew J. Farrer Marek Moskala Anna Sowa-Staszczak 《Parkinsonism & related disorders》2009,15(9):692-696
ObjectiveTo assess for the presence of gastric dysmotility in familial and sporadic Parkinson disease (PD).Methods10 subjects with familial Parkinson disease (fPD), 35 subjects with sporadic Parkinson disease (sPD), and 15 controls, all from academic tertiary care movement disorders centers, were studied. fPD was defined as the presence of at least 2 affected individuals within 2–3 consecutive generations in a family. Molecular genetic analysis has not revealed, thus far, any known genomic abnormality in these families. Gastric emptying was assessed by dynamic abdominal scintigraphy over 92 min following ingestion of a solid meal containing 99mTc-labeled colloid of 40 MBq activity. The main outcome measures were gastric emptying half-time and radiotracer activity over the gastric area at 46 and at 92 min.ResultsGastric emptying time was delayed in 60% of subjects with PD. In comparison to mean t1/2 of 38 ± 7 min in controls, mean t1/2 was 58 ± 25 min in fPD (p = 0.02) and 46 ± 25 min in sPD (p = 0.10). Both fPD and sPD groups included subjects with delayed gastric emptying at an early stage of disease.ConclusionsPatients with fPD showed significantly delayed gastric emptying in comparison to normal age-matched individuals. Further studies of gastrointestinal dysfunction in PD, particularly fPD, are warranted. 相似文献
8.
Jerzy Toborek Zbigniew Gajda Alicja Balin 《Chirurgia narzadów ruchu i ortopedia polska》2005,70(2):115-118
The results of bacteriological tests of Palacos R cement with antibiotic 4 days, 7 days, 2 weeks, 3 weeks and 4 weeks after implantation in rabbit organism have been presented in this work. The results of tests of mechanical characteristics of cement with and without antibiotic samples after being kept in physiological saline for 3 to 6 weeks have also been discussed. Bacteriological tests prove that antibiotic (III generation cephalosporin) added to surgical cement retain its bacteriostatic properties. When tested on rabbits cement plus antibiotic retains its bacteriostatic properties after 4 weeks period. It has state, that by reason of prolonged time of activity antibiotic into surgical cement, it is necessary to investigate the mechanical characteristics of cement conditioned in physiological saline for 3 months at least. 相似文献
9.
10.
Thromboembolic and inflammatory complications of knee joint alloplasty with cemented endoprostheses]
Edward Golec Sebastian Nowak Jaros?aw Wi?niowski Maciej Piatkowski 《Chirurgia narzadów ruchu i ortopedia polska》2004,69(5):315-319
In the presented paper the authors evaluate the long-term results of treatment for inflammatory and thromboembolic complications in knee joint alloplasty with cemented endoprostheses. The clinical material spanning the years 1998-2003 are 15 patients with analysed complications, it determine 9% of all operated. They have evaluated achieved results using the HSS knee rating scale in their own modification. As far as the authors are concerned, venographic examination is a prerequisite for appropriate care of the patients following knee joint alloplasty who might have deep venous thrombosis. It is necessary to provide similar treatment when developing infections are suspected in the perioperative period and in cases of late infections. Consequently, antibiotic therapy and a possible quick bacteriological checkup for healing a postoperative wound is a prerequisite for successful treatment. Achieved results induce statement, that thromboembolic and inflammatory complications caused at most operated chronic vein insufficiency, deficit of range of motion at operated joint and gait insufficiency. Thromboembolic complications was always related with inflammation of knee joint alloplasty in our own material. 相似文献