全文获取类型
收费全文 | 14534篇 |
免费 | 1287篇 |
国内免费 | 43篇 |
专业分类
耳鼻咽喉 | 120篇 |
儿科学 | 565篇 |
妇产科学 | 282篇 |
基础医学 | 1761篇 |
口腔科学 | 288篇 |
临床医学 | 1621篇 |
内科学 | 2816篇 |
皮肤病学 | 161篇 |
神经病学 | 1357篇 |
特种医学 | 847篇 |
外科学 | 2012篇 |
综合类 | 348篇 |
一般理论 | 18篇 |
预防医学 | 1369篇 |
眼科学 | 368篇 |
药学 | 1064篇 |
中国医学 | 10篇 |
肿瘤学 | 857篇 |
出版年
2022年 | 131篇 |
2021年 | 240篇 |
2020年 | 148篇 |
2019年 | 250篇 |
2018年 | 310篇 |
2017年 | 224篇 |
2016年 | 247篇 |
2015年 | 299篇 |
2014年 | 383篇 |
2013年 | 535篇 |
2012年 | 800篇 |
2011年 | 794篇 |
2010年 | 456篇 |
2009年 | 385篇 |
2008年 | 701篇 |
2007年 | 732篇 |
2006年 | 712篇 |
2005年 | 677篇 |
2004年 | 706篇 |
2003年 | 573篇 |
2002年 | 598篇 |
2001年 | 366篇 |
2000年 | 349篇 |
1999年 | 333篇 |
1998年 | 255篇 |
1997年 | 203篇 |
1996年 | 211篇 |
1995年 | 147篇 |
1994年 | 172篇 |
1993年 | 188篇 |
1992年 | 292篇 |
1991年 | 250篇 |
1990年 | 215篇 |
1989年 | 232篇 |
1988年 | 209篇 |
1987年 | 219篇 |
1986年 | 194篇 |
1985年 | 182篇 |
1984年 | 142篇 |
1983年 | 113篇 |
1982年 | 102篇 |
1981年 | 102篇 |
1980年 | 120篇 |
1979年 | 91篇 |
1978年 | 97篇 |
1977年 | 94篇 |
1976年 | 105篇 |
1975年 | 76篇 |
1973年 | 94篇 |
1972年 | 86篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
42.
43.
L M Delahanty R W Grant E Wittenberg J L Bosch D J Wexler E Cagliero J B Meigs 《Diabetic medicine》2007,24(1):48-54
AIMS: To characterize the determinants of diabetes-related emotional distress by treatment modality (diet only, oral medication only, or insulin). METHODS: A total of 815 primary care patients with Type 2 diabetes completed the Problem Areas in Diabetes (PAID) Scale and other questions. We linked survey data to a diabetes clinical research database and used linear regression models to assess the associations of treatment with PAID score. RESULTS: PAID scores were significantly higher among insulin-treated (24.6) compared with oral-treated (17.8, P < 0.001) or diet-treated patients (14.7, P < 0.001), but not different between oral- vs. diet-treated patients (P = 0.2). Group scores remained similar, but the statistical significance of their differences was reduced and ultimately eliminated after sequential adjustment for diabetes severity, HbA(1c), body mass index, regimen adherence, and self-blood-glucose monitoring. Insulin-treated patients reported significantly higher distress than oral- or diet-treated patients on 16 of 20 PAID items. 'Worrying about the future' and 'guilt/anxiety when ... off track with diabetes' were the top two serious problems (PAID >or= 5) in all treatment groups. Not accepting diabetes diagnosis was a top concern for oral- and diet-treated patients, and unclear management goals distressed diet-treated patients. CONCLUSIONS: Primary care patients treated with insulin reported higher diabetes-related emotional distress compared with oral- or diet-treated patients. Greater distress was largely explained by greater disease severity and self-care burdens. To improve diabetes-specific quality of life, clinicians should address patients' sense of worry and guilt, uncertain acceptance of diabetes diagnosis, and unclear treatment goals. 相似文献
44.
REPAIR OF CRANIAL DEFECTS BY CRANIOPLASTY 总被引:1,自引:0,他引:1
45.
Deepali Kumar Dean Erdman Shaf Keshavjee Teresa Peret Raymond Tellier Denis Hadjiliadis Grant Johnson Melissa Ayers Deborah Siegal Atul Humar 《American journal of transplantation》2005,5(8):2031-2036
Community-acquired viral respiratory tract infections (RTI) in lung transplant recipients may have a high rate of progression to pneumonia and can be a trigger for immunologically mediated detrimental effects on lung function. A cohort of 100 patients was enrolled from 2001 to 2003 in which 50 patients had clinically diagnosed viral RTI and 50 were asymptomatic. All patients had nasopharyngeal and throat swabs taken for respiratory virus antigen detection, culture and RT-PCR. All patients had pulmonary function tests at regular intervals for 12 months. Rates of rejection, decline in forced expiratory volume (L) in 1 s (FEV-1) and bacterial and fungal superinfection were compared at the 3-month primary endpoint. In the 50 patients with RTI, a microbial etiology was identified in 33 of 50 (66%) and included rhinovirus (9), coronavirus (8), RSV (6), influenza A (5), parainfluenza (4) and human metapneumovirus (1). During the 3-month primary endpoint, 8 of 50 (16%) RTI patients had acute rejection versus 0 of 50 non-RTI patients (p=0.006). The number of patients experiencing a 20% or more decline in FEV-1 by 3 months was 9 of 50 (18%) RTI versus 0 of 50 non-RTI (0%) (p=0.003). In six of these nine patients, the decline in FEV-1 was sustained over a 1-year period consistent with bronchiolitis obliterans syndrome (BOS). Community-acquired respiratory viruses may be associated with the development of acute rejection and BOS. 相似文献
46.
47.
B Garcia R Zhong J Wijsman P Wang H Chen F Sutherland J Duff D Grant 《Transplantation proceedings》1990,22(6):2469-2470
48.
Pharmacokinetics of cyclosporine in the weanling pig 总被引:1,自引:0,他引:1
49.
The clinical and endocrinological findings in 24 children with septo-optic dysplasia and/or agenesis of the corpus callosum are described with particular reference to posterior pituitary function. Nine had diabetes insipidus. The prevalence of diabetes insipidus was similar in children with complete and incomplete forms of septo-optic dysplasia. Maintenance of normal osmotic balance was very difficult in six of these children, even after the introduction of treatment with vasopressin, either as desmopressin, or lysine vasopressin spray in one of the early cases. 相似文献
50.
To determine whether the Osgood-Schlatter lesion (OS) is produced by avulsion fracture or injury to the patellar tendon, all images obtained in 28 cases of OS in 20 patients (16 scintigrams, 34 computed tomographic [CT] scans, and 27 magnetic resonance [MR] images) were retrospectively analyzed. In 21 cases, imaging was performed before and after treatment; in 20 cases, relief from pain was complete at the time of repeat examination. In all patients (100%), abnormal size of the tendon, decreased attenuation, and increase in signal intensity were compatible with the CT and MR imaging appearance of tendinitis. Distended deep infrapatellar bursa was a frequent finding, particularly on MR studies. These abnormalities had partially disappeared at follow-up examination. An ossicle was seen in only nine of 28 cases (32%); in three of seven cases with follow-up, the ossicle remained nonunited to the tibial tuberosity on follow-up studies despite relief from symptoms. This implies that healing of fracture is not essential for relief from symptoms. These results strengthen the argument that in most cases of OS, insult to the tendon and associated soft tissues, rather than avulsion fracture, causes OS. 相似文献