全文获取类型
收费全文 | 6924篇 |
免费 | 287篇 |
国内免费 | 57篇 |
专业分类
耳鼻咽喉 | 23篇 |
儿科学 | 130篇 |
妇产科学 | 59篇 |
基础医学 | 872篇 |
口腔科学 | 114篇 |
临床医学 | 451篇 |
内科学 | 1910篇 |
皮肤病学 | 75篇 |
神经病学 | 398篇 |
特种医学 | 327篇 |
外科学 | 1029篇 |
综合类 | 57篇 |
一般理论 | 2篇 |
预防医学 | 207篇 |
眼科学 | 175篇 |
药学 | 356篇 |
中国医学 | 11篇 |
肿瘤学 | 1072篇 |
出版年
2024年 | 4篇 |
2023年 | 46篇 |
2022年 | 94篇 |
2021年 | 152篇 |
2020年 | 84篇 |
2019年 | 117篇 |
2018年 | 138篇 |
2017年 | 110篇 |
2016年 | 156篇 |
2015年 | 144篇 |
2014年 | 226篇 |
2013年 | 312篇 |
2012年 | 490篇 |
2011年 | 521篇 |
2010年 | 278篇 |
2009年 | 242篇 |
2008年 | 442篇 |
2007年 | 475篇 |
2006年 | 432篇 |
2005年 | 443篇 |
2004年 | 419篇 |
2003年 | 396篇 |
2002年 | 423篇 |
2001年 | 81篇 |
2000年 | 42篇 |
1999年 | 79篇 |
1998年 | 100篇 |
1997年 | 86篇 |
1996年 | 100篇 |
1995年 | 70篇 |
1994年 | 54篇 |
1993年 | 64篇 |
1992年 | 43篇 |
1991年 | 44篇 |
1990年 | 53篇 |
1989年 | 56篇 |
1988年 | 51篇 |
1987年 | 33篇 |
1986年 | 19篇 |
1985年 | 18篇 |
1984年 | 17篇 |
1983年 | 21篇 |
1982年 | 20篇 |
1981年 | 18篇 |
1980年 | 6篇 |
1979年 | 6篇 |
1978年 | 5篇 |
1976年 | 5篇 |
1974年 | 7篇 |
1966年 | 3篇 |
排序方式: 共有7268条查询结果,搜索用时 15 毫秒
91.
Miyatake N Takahashi K Wada J Nishikawa H Morishita A Suzuki H Kunitomi M Makino H Kira S Fujii M 《Diabetes research and clinical practice》2003,62(3):149-157
OBJECTIVE: To investigate the link between a reduction in blood pressure (BP) and daily exercise. DESIGN: Cross-sectional and longitudinal clinical intervention study with exercise education. SUBJECTS: 43 overweight Japanese men aged 32-59 years (BMI, 29.0+/-2.3 kg/m2) at baseline. Among the participants, a randomly selected 23 overweight men (BMI, 28.5+/-1.7) were further enrolled into the 10 months exercise program. MEASUREMENTS: BP was measured every week and steps per day were also recorded every day throughout the observation period. Fat distribution was evaluated by visceral fat (V) and subcutaneous fat (S) areas measured with computed tomography (CT) scanning at umbilical level, at before, 5 months and after intervention. Anthropometric parameters were also measured at same point. Aerobic exercise level, muscle strength, flexibility and calorie intake and insulin resistance (HOMA index) were investigated at before and after the study. RESULTS: In a cross sectional analysis, systolic BP (SBP) and diastolic BP (DBP) were significantly correlated with body composition. In a second longitudinal analysis, SBP was significantly reduced at 2 months and DBP was also reduced at 3 months, and almost maintained until the end of the observation period. Increasing daily walking was observed in 3 months and maintained until 10 months. Body composition, aerobic exercise level, muscle strength, flexibility and insulin resistance were significantly improved. There was positive correlation between DeltaDBP and Deltavisceral fat area (1-5, 5-10, 1-10 months). By stepwise multiple regression analysis, only Deltavisceral fat area was independently related to DeltaDBP at a significant level (1-10 months: DeltaDBP=-0.608+0.105Deltavisceral fat area, r2=0.227, P=0.0334). CONCLUSION: The present study indicated daily exercise lowers BP and visceral fat area is the critical factor for BP change. 相似文献
92.
93.
Nobuyuki Kamio Isao Kobayashi Masatomo Mori Teruo Uehara Hitoshi Fukuda Kazutoshi Tsuyusaki Yasuko Nakamua Setsuo Kobayashi 《Metabolism: clinical and experimental》1977,26(3):295-299
Serial measurements of serum triiodothyronine (T3), thyroxine (T4), thyrotropin (TSH), and 4-hr thyroidal 131I uptake were carried out in nine patients with subacute thyroiditis. In the acute phase, suppressed TSH and 131I uptake were observed simultaneously with the elevations of T3 and T4. Thyrotropin-releasing hormone (TRH) failed to increase TSH in all patients studied. The mean value of an increment in serum TSH was only 1.8 μU/ml during the recovery phase when 131I uptake was normal or hyper-normal. In addition, and elevated 131I uptake was not necessarily associated with an immediate increase in the serum T3 and T4. These observations suggest that the resumption of the iodide pump may be more important than an increment in TSH in producing normal or hypernormal 131I uptake during the recovery phase. There appears to be a dissociation between the reestablishment of 131I uptake and the resumption of the mechanism of hormonal synthesis and secretion in the thyroid. 相似文献
94.
95.
Life‐threatening hemorrhage from the corona mortis after laparoscopic inguinal hernia repair: Report of a case 下载免费PDF全文
Tomohiko Yasuda Akihisa Matsuda Masao Miyashita Satoshi Matsumoto Nobuyuki Sakurazawa Youichi Kawano Kumiko Sekiguchi Fumihiko Ando Takeshi Matsutani Eiji Uchida 《Asian journal of endoscopic surgery》2018,11(2):169-172
Along with the increased use of other laparoscopic procedures, laparoscopic inguinal hernia repair has become widely used because of its minimally invasive nature. Here, we report a case of 66‐year‐old man who underwent transabdominal preperitoneal laparoscopic hernioplasty and developed hemorrhagic shock on postoperative day 1. CT showed postoperative venous hemorrhage from the retropubic space. Successful hemostasis of the massive hemorrhage was achieved laparoscopically. The origin of the hemorrhage was assumed to be the corona mortis vein, which was slightly injured during the operation. Despite the rarity of this complication, surgeons must be aware of the need to carefully dissect and fix the mesh in the retropubic space to avoid injuring the corona mortis. Laparoscopic hemostasis may be an effective alternative to the open approach. 相似文献
96.
97.
98.
99.
100.
Fukuda Y Bamba H Okui M Tamura K Tanida N Satomi M Shimoyama T Nishigami T 《Digestion》2001,63(Z1):93-96
It is important to study the effect of Helicobacter pylori infection on the permeability of the intestine. Permeability was evaluated by oral sucrose tolerance test using sucrose 25 g in 200 ml of water. Existence of H. pylori itself was associated with increased permeability of sucrose. Also, the permeability of sucrose increased as polymorphonuclear and lymphocyte infiltration increased. The increase of mucosal permeability suggests that antigens like protein penetrate into the body and result in systemic reactions. Thus, it is important to study the implication of increased permeability in relation not only to gastric diseases but also certain systemic diseases. 相似文献